That's very sad. Just last Sunday we were out walking in Mabie forest, Dumfriesshire, when I called the dogs over to the side of the track to let some cyclists go by. I nearly put my foot on one but TBH I moved swiftly as I thought it was a great big pile of dog poo I was stepping on. It was a female so quite dark brown. Fortunately I saw it before the dogs did and hustled them off. The snake slithered off and they still hadn't seen it.